摘要
分布式多媒体系统面临的最大挑战是支持稳定的连续媒体流和媒体流间同步．分布式多媒体资源管理模型是保证它们的关键．本文提出了一种基于节的资源分配和管理模型．在资源分配时，它通过建立连续媒体流的线程、I／O处理、缓冲区和网络处理的平衡方程，计算保证稳定的连续媒体流所必需的资源．在资源管理时，它通过调整媒体流的速率达到媒体流间同步．本文还提出了一种实时的节资源请求方案，它能使系统资源开销最小．最后给出了在交换式100Mbps快速以太同环境下的实验结果．
The guarantees of steady rate of continuous multimedia stream and synchronization among media streams are important problem in distributed multimedia system (DMS). The model of resource management is key issue to guarantee them in systems. This paper presents a model of session-based resource allocation and management. When resources are allocated, it can meet the resources required by steady continuous media stream by making equilibrium equation to allocate thread periods, I/O processors periods, buffer space and network bandwidth for continuous media streams. The results show that periods of thread, I/O process and network process are functions about buffer space. When a session requests resources,system will decide whether it can be scheduled according to schedulability of CPU period, buffer space, I/O bandwidth and network bandwidth that are presented in this paper. When resource is managed, it can meet synchronization among media streams by adjusting their rates. On this scheme, the authors suggest an approach to real-time generation of session resource requirements, which resource overheadsis minimized. Finally, the experimental results in 100Mbps switching Ethernet are given.
出处
《计算机学报》
EI
CSCD
北大核心
1998年第11期970-979,共10页
Chinese Journal of Computers
关键词
资源分配
资源管理
分布式多媒体
信息处理
Session, session scheduling, resource requirement, resource allocation, resource management
